Process of treating substances containing crude tartar.



UNITED STATES PATENT OFFICE.

VICTOR JOSEPH GARIN, OF ANNEMASSE, AND FERNAND DAVID, OF CETTE, FRANCE,AS-

SIGNORS TO COMPAGNIE FRANCAISE DES PRODUITS TARTRIQUES, OF BEZIERS,

FRANCE.

PROCESS OF TREATING SUBSTANCES CONTAINING CRUDE TARTAR.

Specification of Letters Patent.

Patented Sept. 15, 1908.

Application filed April 5, 1907. Serial No. 366,527.

To all whom it may concern:

Be it known that we, VICTOR JosEPH GARIN, chemist, and FERNAND DAVID,engineer, both citizens of the Republic of France, residing,respectively, at Annemasse,

I-Iaute Savoie, and Cette, Herault, France,

have invented an Improved Process of Treating Substances ContainingCrude Tartar, of which the following is a specification.

This invention has for object an im proved process for treatingsubstances containing crude tartar whereby coloring matters containedtherein are rendered insoluble.

The improved process is based upon the use of formaldehyde in the formof solution called formalin in commerce, or that of its polymer,trioxymethylene.

The process is applicable to the treatment of green or dry wine lees,crude tartar, still crystals and the like, and generally to thetreatment of all substances containing tartrous matters. 7

The substances to be treated, whether damp or dry, are mixed with aquantity of formalin which may vary with each case but approximate tofrom 1 to 2 per cent. The mixture is made in any suitable malaxator andin as intimate a manner as possible. The magma obtained is dried at atemperature'iof nearly 100 degrees centigrade and is again pulverized ifnecessary. The substance obtained can then be used in the manufacture oftartaric products as in the case of the materials ordinarily employedfor such purpose. The action of the formaldehyde on the albuminoidsubstances present in the crude material fixes the coloring matters inthe form of an insoluble lake. The decantation and filtration of thesesubstances are thus rendered very easy. The liquids have but very littlecolor and White crystals are obtained therefrom straight away.

If the proportion of the albuminoid substances be too small inproportion to the coloring matters to effect the desired result as inthe case of tartar or still crystals for example, it may be increasedpreviously by adding such substance in the form for examples of blood,white of egg, casein, or beer yeast.

In the case of tartar itself, the proportion of 4 per cent. of blood,diluted with sufficient water to absorb the tartar, gives a satisfactoryresult.

What we claim is 1. In the treatment of substances containing crudetartar to facilitate the removal of the coloring matter therein, theaddition thereto of a substance of formaldehyde character.

2. In the treatment of substances containing crude tartar to facilitatethe removal of the coloring matter therein, the addition thereto, in thepresence of an albuminoid, of a substance of formaldehyde character.

3. In the treatment of substances containing crude tartar to facilitatethe removal of the coloring matter therein, the addition thereto of analbuminoid and a substance of formaldehyde character, substantially asdescribed.

4. In the treatment of substances containing crude tartar to facilitatethe removal of the coloring matter therein, the addition thereto, in thepresence of an albuminoid, of asubstance of formaldehyde character andof a dissolving fluid whereby said coloring matter is carried down inthe form of an insoluble lake, substantially as described.

Signed at Cette this 22d day of March,

VICTOR JOSEPH GARIN. FERNAND DAVID. Witnesses:

N. RIvsoHoNEN, COMBARI.

